diff options
Diffstat (limited to 'firmware/src/main.c')
| -rw-r--r-- | firmware/src/main.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/firmware/src/main.c b/firmware/src/main.c index a9721ef..c8cddb2 100644 --- a/firmware/src/main.c +++ b/firmware/src/main.c @@ -1,13 +1,38 @@ #include <stdbool.h> +#include <stdint.h> -#include <zephyr/kernel.h> #include <zephyr/device.h> #include <zephyr/drivers/uart.h> +#include <zephyr/kernel.h> +#include <zephyr/sys/util.h> #define UART_DEVICE_NODE DT_CHOSEN(zephyr_shell_uart) static const struct device *const uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE); -#define SLIP_END 0xC0 +#define SLIP_END 0xC0 +#define SLIP_ESC 0xDB +#define SLIP_ESC_END 0xDC +#define SLIP_ESC_ESC 0xDD + +void send_frame(uint8_t *buffer, size_t len) { + for (size_t i = 0; i < len; i++) { + uint8_t octet = *(buffer + i); + switch (octet) { + case SLIP_END: + uart_poll_out(uart_dev, SLIP_ESC); + uart_poll_out(uart_dev, SLIP_ESC_END); + break; + case SLIP_ESC: + uart_poll_out(uart_dev, SLIP_ESC); + uart_poll_out(uart_dev, SLIP_ESC_ESC); + break; + default: + uart_poll_out(uart_dev, octet); + break; + } + } + uart_poll_out(uart_dev, SLIP_END); +} int main(void) { @@ -16,9 +41,11 @@ int main(void) return 0; } + uint8_t frame[] = {0xDE, 0xAD}; + while (true) { k_sleep(K_MSEC(1000)); - uart_poll_out(uart_dev, SLIP_END); + send_frame(frame, ARRAY_SIZE(frame)); } return 0; |